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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be514c075357f92daf1d4d9007bb1fdee92641d6b0bd6dd08e9b49cdfa6aa58f' 
  AND token = 'MnJ1Y3F75WlJDl22aBEAv0tt/Hz5cwLYm24CtNSj9OI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}